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Message: <blockquote data-quote="Henry" data-source="post: 2164674" data-attributes="member: 158">I dunno - assuming pure gold's specific gravity is 19.32 g/cm^3, and a quarter's volume is about .57 cm^3 (1.1 cm radius, .15cm height), then a coin the size of a U.S. quarter weighing pure gold would weigh a little over 11 grams. That gets you a one pound stack of 41 coins. That's pretty close. If it's only 18K or even 14K gold, then that can get even BELOW the gram weights for 50 coins to a pound.Secondly, take a coin 1 inch in diameter (1.27cm radius), and the height of a quarter, and make it pure gold, and you get 14.6 grams per coin, which makes a little over 30 coins per pound, still not that far off if you're talking gold alloy.</blockquote>